CN207896235U - Multigroup lithium battery parallel connection manages system - Google Patents
Multigroup lithium battery parallel connection manages system Download PDFInfo
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- CN207896235U CN207896235U CN201820391869.7U CN201820391869U CN207896235U CN 207896235 U CN207896235 U CN 207896235U CN 201820391869 U CN201820391869 U CN 201820391869U CN 207896235 U CN207896235 U CN 207896235U
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- Prior art keywords
- master control
- control center
- center module
- battery
- battery protecting
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
Abstract
The utility model discloses a kind of multigroup lithium battery parallel connections to manage system, including N group battery protecting plates, battery protecting plate includes the AFE(analog front end) for monitoring lithium battery module state, switching tube for controlling battery protection switching plate, it receives AFE(analog front end) signal and realizes the Master Control Center module of switching tube break-make control, Master Control Center module has unique address, signal connects between the Master Control Center module and the Master Control Center module of P+1 group battery protecting plates of P group battery protecting plates, signal connects between the Master Control Center module and the Master Control Center module of N group battery protecting plates of 1st group of battery protecting plate.Its multigroup batteries in parallel connection protection harden structure for using chain type to connect realizes electric vehicle lithium battery management; each battery protecting plate, which has, realizes level interconnection between unique address and multigroup battery protecting plate; hardware foundation is provided for multistage communication, basis is provided for the intercommunication of battery protecting plate.
Description
Technical field
The utility model is related to lithium battery management system fields, and in particular to a kind of multigroup lithium battery parallel connection management system.
Background technology
Electronic automobile-used lithium battery group is all made of management of the battery management system realization to battery, existing battery management system
Often use N-MOS pipes to be used as on-off action, with realize lithium battery group is overcharged, cross put, overcurrent, the protections such as short circuit.Cell tube
Reason system has certain crash rate, and there are certain breakdown possibility for N-MOS pipes, so battery management system is the case where failing
Under, lithium electricity group will lose protective effect, security risk occur.In the case of only single group battery, when this group of battery pack goes out
Existing failure, will be ineffective to battery pack protection, therefore devises multigroup lithium battery group parallel connection management system.On the market more
Group battery pack Managed Solution generally use is bifurcated management mode, i.e. the multiple battery protecting plates of host, such as Fig. 1 institutes
Show, has the following problems：When some battery protecting plate breaks down, judgement can not be identified in other battery protecting plates,
It cannot be in communication with each other between each battery protecting plate.
Utility model content
In order to solve the above-mentioned technical problem the utility model provides a kind of multigroup lithium battery parallel connection management system.
The utility model is achieved through the following technical solutions：
Multigroup lithium battery parallel connection manages system, including N group battery protecting plates, the battery protecting plate include for monitoring lithium
The AFE(analog front end) of battery modules state, the switching tube for controlling battery protection switching plate receive AFE(analog front end) signal and realize
The Master Control Center module of switching tube break-make control, the Master Control Center module have unique address, the master of P group battery protecting plates
Control signal between center module and the Master Control Center module of P+1 group battery protecting plates connect, the master control of the 1st group of battery protecting plate
Signal connects between center module and the Master Control Center module of N group battery protecting plates, wherein N is the natural number more than 1, and P is
Natural number less than N.This programme optimizes on the basis of existing technology, is protected using multigroup batteries in parallel connection of chain type connection
Harden structure realizes electric vehicle lithium battery management.Each battery protecting plate has real between unique address and multigroup battery protecting plate
Existing level interconnection, provides hardware foundation for multistage communication, basis is provided for the intercommunication of battery protecting plate.
Preferably, the Master Control Center module realizes the connection with adjacent Master Control Center module, institute by external interface
It states and is connected with communication isolation circuit between Master Control Center module and external interface.Optical coupling isolation circuit makes segregate two parts electricity
Do not have between road electricity be directly connected to, prevent because have electricity connection caused by interfere, especially the control circuit of low pressure with outside
Between portion's high-tension circuit.
Preferably, the AFE(analog front end) includes BQ76940.BQ76940 can monitor up to 15 batteries or typical case's 48V electricity
Pond, so as to simplify battery design, optimization plate grade space.Comprehensive battery measurement：It is accurate to measure cell voltage, temperature and electricity
Pond group electric current, it may be determined that remaining capacity and cell health state.Built-in hardware protection：Electric quantity balancing, integrated type analog-to-digital converter
The battery security of highest level can be provided with built-in hardware protection function.Feature integration：It can be by the sharp drop 30% in plate grade space, most
Limits reduce material cost.The quick development time：The integrated universal digital interface of all three sections of devices can be saved a large amount of
Development time, work and cost.
Preferably, the external interface further includes for accessing the interface for waking up, accessing detection battery protecting plate.
The utility model compared with prior art, has the following advantages and advantages：
1, the utility model realizes electric vehicle lithium battery management using multigroup batteries in parallel connection protection harden structure of chain type connection,
Each battery protecting plate, which has, realizes level interconnection between unique address and multigroup battery protecting plate, provided firmly for multistage communication
Part basis, basis is provided for the intercommunication of battery protecting plate.
Description of the drawings
Attached drawing described herein is used for providing further understanding the utility model embodiment, constitutes the one of the application
Part does not constitute the restriction to the utility model embodiment.
Fig. 1 is the structural schematic diagram of existing battery pack management.
Fig. 2 is the functional block diagram of this programme.
Fig. 3 is the circuit diagram of this programme battery protecting plate.
Fig. 4 is the circuit diagram of AFE(analog front end).
Fig. 5 is the circuit diagram of power unit.
Fig. 6 is the circuit diagram of power control circuit.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, with reference to embodiment and attached drawing,
The utility model is described in further detail, and the exemplary embodiment and its explanation of the utility model are only used for explaining this
Utility model is not intended to limit the scope of the present invention.
Embodiment 1
A kind of multigroup lithium battery parallel connection as shown in Figure 2 and Figure 3 manages system, including N group battery protecting plates, the battery
Protection board includes for monitoring the AFE(analog front end) of lithium battery module state, the switching tube for controlling battery protection switching plate, connecing
It receives AFE(analog front end) signal and realizes that the Master Control Center module of switching tube break-make control, the Master Control Center module have uniquely
Location, signal connects between the Master Control Center module and the Master Control Center module of P+1 group battery protecting plates of P group battery protecting plates
Connect, signal connects between the Master Control Center module and the Master Control Center module of N group battery protecting plates of the 1st group of battery protecting plate,
Wherein, N is the natural number more than 1, and P is the natural number less than N.
Embodiment 2
The present embodiment is refined on the basis of above-described embodiment principle.
As shown in figure 3, Master Control Center module by external interface RX, TX realize the connection with adjacent Master Control Center module with
It realizes parallel relationship, communication isolation circuit is connected between Master Control Center module and external interface.When used in parallel, pass through single guarantor
RX, TX interface of backplate carry out level interconnection, realize multistage communication.There is the battery pack protection plate of RX, TX interface using single group,
Multigroup protection board communication system is formed, protection system in parallel is constituted, first group second group of TX interface of RX interfaces is sent
Data, the data that the RX interface P+1 group TX interfaces of P groups are sent, the 1st group of TX interface of N group RX interfaces
The data sent distribute an address to each group of protection board system, and each group of protection board is added or reduces system can be automatic
Multigroup battery pack protection plate parallel connection protection battery pack is realized in identification.The access of the BX and BIN management level equipment of external interface,
It wakes up, the access of protection board is judged by BX.
As shown in figure 4, AFE(analog front end) is constituted using BQ76940 and its peripheral circuit, acquire the voltage of lithium battery, electric current,
The data such as temperature, and send related data to Master Control Center module.Corresponding pin, that is, pin marked as SRP, SRN is
42,43 feet are the current detecting end of the analog front-end module.
STM8L101F3P6 can be used in Master Control Center module and its peripheral circuit is constituted.The chip is market popular software,
Structure is existing structure, therefore its chip structure figure is not provided in the application.Following connection type, 18 foot SDA specifically can be used
With 19 foot SCL by standard I2C communication protocols with the 4 foot SDA of BQ76940 and the SCL of 5 feet communicated, transmit battery
The parameters such as voltage, electric current, temperature.Pass through the conducting and closing of 12 foot CHG_DET control charging metal-oxide-semiconductors.11 foot COM_Int acquisitions
Level signal from Bin identifies whether have new battery protecting plate to be added.10 foot LOAD_RM_DEF identification loads.
Circuit as shown in Figure 5 can be used in power unit, and 3.3V voltage stabilizing electricity is provided by LDO for master control center module
Source.LDO voltage stabilizer can be run when input-output differential voltage is smaller.LDO Voltagre regulators can provide fast transient response,
Wide input voltage range, low quiescent current, low noise, high PSRR.
As shown in fig. 6, power control circuit also can be used provides power supply for communication isolation module.When Master Control Center module
After COM_Int pins recognize the interruption of equipment access, i.e. 9 feet of POWER pins of Master Control Center module export high level, drive
Dynamic transistor Q2 exports high level, and to make BX export high level, while LDO power supply chips export 5V voltages, give communication isolating
Module for power supply drives outputting and inputting for optocoupler, to achieve the purpose that communicate with post-module.
Above-described specific implementation mode, to the purpose of this utility model, technical solution and advantageous effect carried out into
One step is described in detail, it should be understood that the foregoing is merely specific embodiment of the present utility model, is not used to limit
Determine the scope of protection of the utility model, within the spirit and principle of the utility model, any modification for being made equally is replaced
It changes, improve, should be included within the scope of protection of this utility model.
Claims (4)
1. multigroup lithium battery parallel connection manages system, including N group battery protecting plates, the battery protecting plate includes for monitoring lithium electricity
The AFE(analog front end) of pond module state, the switching tube for controlling battery protection switching plate receive AFE(analog front end) signal and realize and open
Close the Master Control Center module of pipe break-make control, which is characterized in that the Master Control Center module has unique address, P group batteries
Signal connection, the 1st group of battery are protected between the Master Control Center module and the Master Control Center module of P+1 group battery protecting plates of protection board
Signal connects between the Master Control Center module and the Master Control Center module of N group battery protecting plates of backplate, wherein N is more than 1
Natural number, P are the natural number less than N.
2. multigroup lithium battery parallel connection according to claim 1 manages system, which is characterized in that the Master Control Center module is logical
The connection for crossing external interface realization and adjacent Master Control Center module, is connected with logical between the Master Control Center module and external interface
Believe isolation circuit.
3. multigroup lithium battery parallel connection according to claim 1 manages system, which is characterized in that the AFE(analog front end) includes
BQ76940。
4. multigroup lithium battery parallel connection according to claim 1 manages system, which is characterized in that the external interface further includes
For accessing the interface for waking up, accessing detection battery protecting plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820391869.7U CN207896235U (en) | 2018-03-21 | 2018-03-21 | Multigroup lithium battery parallel connection manages system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820391869.7U CN207896235U (en) | 2018-03-21 | 2018-03-21 | Multigroup lithium battery parallel connection manages system |
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| CN207896235U true CN207896235U (en) | 2018-09-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109857010A (en) * | 2018-12-24 | 2019-06-07 | 惠州市蓝微电子有限公司 | A kind of two-wire realizes the control method of power supply and two-way communication in real time |
| CN117033285A (en) * | 2023-08-10 | 2023-11-10 | 诺初绿能(深圳)科技有限公司 | Hierarchical modification method, hierarchical modification device, mobile charging equipment and storage medium |
-
2018
- 2018-03-21 CN CN201820391869.7U patent/CN207896235U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109857010A (en) * | 2018-12-24 | 2019-06-07 | 惠州市蓝微电子有限公司 | A kind of two-wire realizes the control method of power supply and two-way communication in real time |
| CN117033285A (en) * | 2023-08-10 | 2023-11-10 | 诺初绿能(深圳)科技有限公司 | Hierarchical modification method, hierarchical modification device, mobile charging equipment and storage medium |
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